I take it you read through the "Why am I here" and FAQ at http://www.apews.org
Why are you listed?
If you "own the network range of IPs'" there are instructions on how to be removed.
If you are just a user, then talk to your ISP about getting unlisted.

And also talk to the companies that you are trying to contact and let them know that your mail is being blocked. They can configure their severs to white list your domain so and not use apews for your mail.

I will have time this weekend to do some more research. Can you give me more details on your specific situation?
Is web traffic to your servers blocked or is email being blocked?
Business or consumer.
Internet type DSL, cable, etc.
Fixed or dynamic IP
Do you run any servers at your site?

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